111000221001 has 24 divisors (see below), whose sum is σ = 166205991744. Its totient is φ = 71327221920.

The previous prime is 111000220997. The next prime is 111000221009. The reversal of 111000221001 is 100122000111.

It is a happy number.

It is not a de Polignac number, because 111000221001 - 2² = 111000220997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (111000221009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1522005 + ... + 1593266.

It is an arithmetic number, because the mean of its divisors is an integer number (6925249656).

Almost surely, 2^111000221001 is an apocalyptic number.

It is an amenable number.

111000221001 is a deficient number, since it is larger than the sum of its proper divisors (55205770743).

111000221001 is a wasteful number, since it uses less digits than its factorization.

111000221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3115421 (or 3115418 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111000221001 its reverse (100122000111), we get a palindrome (211122221112).

The spelling of 111000221001 in words is "one hundred eleven billion, two hundred twenty-one thousand, one".